The October update is now rolling out to preview members,
this update is said to include DLNA and MKV support on a network!!!
Currently installing it i hope DLNA works perfectly and smoothly without judder.
http://news.xbox.com/2014/09/xbox-on...ctober-preview
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After installing the update the Mediaplayer Preview app automatically found my Mybook World Twonkymedia server.
Currently testing Xvid streaming via wireless and they seem to play pretty well.
Will test some MKV and MP4 soon.